Compression Ignition Addict
Join Date: Apr 2007
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There are two oil pressures ..... base engine oil pressure and high pressure oil pressure.
If it runs, then you have both base oil pressure AND high pressure oil pressure. Now it may not be high enough to be "on-spec", but it can't be too terribly bad. You need decent low pressure oil to feed the high pressure system, or it won't start/run.
Do you have oil pressure indication on the dash? If not, then it is probably ONLY the oil pressure switch. The switch ONLY goes to the dash gauge. It does NOT send any information to the PCM.
If you only have bad head gaskets, then 7-8 grand can get you new heads, head studs, an EGR delete, and pay for the labor (but do it yourself or find a good shop).
No way I would discard an engine for ONLY blown head gaskets (assuming the rest of the truck was in decent shape).
btw, the coolant tank (called the degas bottle) is supposed to be pressurized some when everything is up to temperature. 5-10 psig is the normal range.
Can't give good advice based on hearsay.
Get the pressure gauge on the degas bottle. Look into installing a fuel pressure sensor and gauge.
Get an engine monitoring system and do some investigating yourself. First thing I would look at (after coolant pressure and fuel pressure) is the oil and coolant temps. Once the engine is fully heated up, if the oil temp is more than 15 degrees hotter than the coolant temp, then you have a plugged oil cooler that would need to be replaced when the head work was being done.
Plan on getting rid of the coolant, fully flushing the system, and filling w/ an EC-1 rated ELC coolant.
As far as monitoring the engine, I would recommend a smart phone app and an ELM327 adapter.
WiFi for i-phone and bluetooth for android.
Torque Pro is good and so is ForScan. I like Torque Pro a little better, but it doesn't read codes as well as ForScan. If you don't want to go the smart phone route (cost is maybe $35 for the adapter and $5-10 for the app), a scangaugeII w/ the custom Ford PIDS loaded is around $130. Just be aware that the scangaugeII is not going to read codes for you.
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Last edited by bismic; 09-16-2018 at 02:52 PM.